New Dorp girls basketball coach Alex Immella has stepped down from his position and former assistant and junior varsity coach Mike Padmore will take over the reins of the program, The Post has learned.

Immella, citing personal reasons, decided to leave the team last week after five years at the helm. His wife, Sandra, is pregnant with their second child and the grind of coaching three seasons – he’s New Dorp’s boys tennis and girls golf coach – became too great of a burden, he told The Post.

“It’s a very demanding job,” Immella said. “I want to make sure the kids have someone who’s fully committed. Not that I don’t give it my all, but I wanna make sure it was done right.”

He had the program going in the right direction. After going 2-12 his second season, New Dorp was 9-5 last year and finished fourth in deep PSAL Staten Island A. The Central Cougars, as the No. 22 seed, upset No. 11 Beacon in the PSAL Class A first round. Two weeks ago, they defeated Tottenville, last year’s ‘A’ runner-up, and have emerged as a PSAL ‘A’ title contender.

“It was something that was building for awhile,” Immella said of his impromptu departure. “I gotta make sure my family is OK. I love coaching basketball, it’s just a lot. It’s a very demanding job. It’s every day for five months. You have to make sure you give it everything you have.”

Immella also has a part-time job as a locker room attendant for Knicks games. He has a background in athletic training and he’s worked in the visitor’s locker room at Madison Square Garden for 13 years. That combined with coaching basketball, he said, became too much with a second child on the way.

“I can’t complain, because people would trade with me in a second,” Immella said. “Over time it just becomes very hard.”

He leaves New Dorp girls basketball in the hands of trusted assistant Mike Padmore and the school will hire a new JV coach to fill Padmore’s old spot. The new varsity head man doesn’t envision there being much of a transition.

“I think it’ll be a challenge, but I think it’ll be an easy transition,” Padmore said. “I was at every game. I was on the bench with them. Now I’m just making the decisions. I’m the same face.”

New Dorp heads to CSI/McCown at 6 p.m. Tuesday night for Padmore’s first game as head coach. Immella said it was a hard decision, but the correct one.

“Sometimes you gotta be honest with yourself,” he said. “It’s too much for me. I didn’t want to do the kids and the school a disservice.”